Every day, the skin naturally divests itself of skin cells. Age, skin diseases, genetic factors, dry or oily skin can slow down or disrupt this process. This can cause impurities, milia, clogged pores, deep wrinkles... may arise. In short, a dull, uneven skin.
An exfoliant (a mild acid) removes dead skin cells. This reduces the visibility of wrinkles, brightens a dull skin, smoothes rough skin and improves the hydration (the skin can again optimally absorb ingredients).